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-rw-r--r--hw/e1000.c999
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diff --git a/hw/e1000.c b/hw/e1000.c
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+++ b/hw/e1000.c
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+/*
+ * QEMU e1000 emulation
+ *
+ * Nir Peleg, Tutis Systems Ltd. for Qumranet Inc.
+ * Copyright (c) 2008 Qumranet
+ * Based on work done by:
+ * Copyright (c) 2007 Dan Aloni
+ * Copyright (c) 2004 Antony T Curtis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "hw.h"
+#include "pci.h"
+#include "net.h"
+
+#define __iomem
+typedef int boolean_t;
+#include "e1000_hw.h"
+
+#define DEBUG
+
+#ifdef DEBUG
+enum {
+ DEBUG_GENERAL, DEBUG_IO, DEBUG_MMIO, DEBUG_INTERRUPT,
+ DEBUG_RX, DEBUG_TX, DEBUG_MDIC, DEBUG_EEPROM,
+ DEBUG_UNKNOWN, DEBUG_TXSUM, DEBUG_TXERR, DEBUG_RXERR,
+ DEBUG_RXFILTER, DEBUG_NOTYET,
+};
+#define DBGBIT(x) (1<<DEBUG_##x)
+static int debugflags = DBGBIT(TXERR) | DBGBIT(GENERAL);
+
+#define DBGOUT(what, fmt, params...) do { \
+ if (debugflags & DBGBIT(what)) \
+ fprintf(stderr, "e1000: " fmt, ##params); \
+ } while (0)
+#else
+#define DBGOUT(what, fmt, params...) do {} while (0)
+#endif
+
+#define IOPORT_SIZE 0x40
+#define PNPMMIO_SIZE 0x60000
+
+/*
+ * HW models:
+ * E1000_DEV_ID_82540EM works with Windows and Linux
+ * E1000_DEV_ID_82573L OK with windoze and Linux 2.6.22,
+ * appears to perform better than 82540EM, but breaks with Linux 2.6.18
+ * E1000_DEV_ID_82544GC_COPPER appears to work; not well tested
+ * Others never tested
+ */
+enum { E1000_DEVID = E1000_DEV_ID_82540EM };
+
+/*
+ * May need to specify additional MAC-to-PHY entries --
+ * Intel's Windows driver refuses to initialize unless they match
+ */
+enum {
+ PHY_ID2_INIT = E1000_DEVID == E1000_DEV_ID_82573L ? 0xcc2 :
+ E1000_DEVID == E1000_DEV_ID_82544GC_COPPER ? 0xc30 :
+ /* default to E1000_DEV_ID_82540EM */ 0xc20
+};
+
+typedef struct E1000State_st {
+ PCIDevice dev;
+ VLANClientState *vc;
+ NICInfo *nd;
+ uint32_t instance;
+ uint32_t mmio_base;
+ int mmio_index;
+
+ uint32_t mac_reg[0x8000];
+ uint16_t phy_reg[0x20];
+ uint16_t eeprom_data[64];
+
+ uint32_t rxbuf_size;
+ uint32_t rxbuf_min_shift;
+ int check_rxov;
+ struct e1000_tx {
+ unsigned char header[256];
+ unsigned char data[0x10000];
+ uint16_t size;
+ unsigned char sum_needed;
+ uint8_t ipcss;
+ uint8_t ipcso;
+ uint16_t ipcse;
+ uint8_t tucss;
+ uint8_t tucso;
+ uint16_t tucse;
+ uint8_t hdr_len;
+ uint16_t mss;
+ uint32_t paylen;
+ uint16_t tso_frames;
+ char tse;
+ char ip;
+ char tcp;
+ } tx;
+
+ struct {
+ uint32_t val_in; // shifted in from guest driver
+ uint16_t bitnum_in;
+ uint16_t bitnum_out;
+ uint16_t reading;
+ uint32_t old_eecd;
+ } eecd_state;
+} E1000State;
+
+#define defreg(x) x = (E1000_##x>>2)
+enum {
+ defreg(CTRL), defreg(EECD), defreg(EERD), defreg(GPRC),
+ defreg(GPTC), defreg(ICR), defreg(ICS), defreg(IMC),
+ defreg(IMS), defreg(LEDCTL), defreg(MANC), defreg(MDIC),
+ defreg(MPC), defreg(PBA), defreg(RCTL), defreg(RDBAH),
+ defreg(RDBAL), defreg(RDH), defreg(RDLEN), defreg(RDT),
+ defreg(STATUS), defreg(SWSM), defreg(TCTL), defreg(TDBAH),
+ defreg(TDBAL), defreg(TDH), defreg(TDLEN), defreg(TDT),
+ defreg(TORH), defreg(TORL), defreg(TOTH), defreg(TOTL),
+ defreg(TPR), defreg(TPT), defreg(TXDCTL), defreg(WUFC),
+ defreg(RA), defreg(MTA), defreg(CRCERRS),
+};
+
+enum { PHY_R = 1, PHY_W = 2, PHY_RW = PHY_R | PHY_W };
+static char phy_regcap[0x20] = {
+ [PHY_STATUS] = PHY_R, [M88E1000_EXT_PHY_SPEC_CTRL] = PHY_RW,
+ [PHY_ID1] = PHY_R, [M88E1000_PHY_SPEC_CTRL] = PHY_RW,
+ [PHY_CTRL] = PHY_RW, [PHY_1000T_CTRL] = PHY_RW,
+ [PHY_LP_ABILITY] = PHY_R, [PHY_1000T_STATUS] = PHY_R,
+ [PHY_AUTONEG_ADV] = PHY_RW, [M88E1000_RX_ERR_CNTR] = PHY_R,
+ [PHY_ID2] = PHY_R,
+};
+
+static void
+ioport_map(PCIDevice *pci_dev, int region_num, uint32_t addr,
+ uint32_t size, int type)
+{
+ DBGOUT(IO, "e1000_ioport_map addr=0x%04x size=0x%08x\n", addr, size);
+}
+
+static void
+set_interrupt_cause(E1000State *s, int index, uint32_t val)
+{
+ if (val)
+ val |= E1000_ICR_INT_ASSERTED;
+ s->mac_reg[ICR] = val;
+ qemu_set_irq(s->dev.irq[0], (s->mac_reg[IMS] & s->mac_reg[ICR]) != 0);
+}
+
+static void
+set_ics(E1000State *s, int index, uint32_t val)
+{
+ DBGOUT(INTERRUPT, "set_ics %x, ICR %x, IMR %x\n", val, s->mac_reg[ICR],
+ s->mac_reg[IMS]);
+ set_interrupt_cause(s, 0, val | s->mac_reg[ICR]);
+}
+
+static int
+rxbufsize(uint32_t v)
+{
+ v &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 |
+ E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 |
+ E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256;
+ switch (v) {
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384:
+ return 16384;
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192:
+ return 8192;
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096:
+ return 4096;
+ case E1000_RCTL_SZ_1024:
+ return 1024;
+ case E1000_RCTL_SZ_512:
+ return 512;
+ case E1000_RCTL_SZ_256:
+ return 256;
+ }
+ return 2048;
+}
+
+static void
+set_rx_control(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[RCTL] = val;
+ s->rxbuf_size = rxbufsize(val);
+ s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1;
+ DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT],
+ s->mac_reg[RCTL]);
+}
+
+static void
+set_mdic(E1000State *s, int index, uint32_t val)
+{
+ uint32_t data = val & E1000_MDIC_DATA_MASK;
+ uint32_t addr = ((val & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
+
+ if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1) // phy #
+ val = s->mac_reg[MDIC] | E1000_MDIC_ERROR;
+ else if (val & E1000_MDIC_OP_READ) {
+ DBGOUT(MDIC, "MDIC read reg 0x%x\n", addr);
+ if (!(phy_regcap[addr] & PHY_R)) {
+ DBGOUT(MDIC, "MDIC read reg %x unhandled\n", addr);
+ val |= E1000_MDIC_ERROR;
+ } else
+ val = (val ^ data) | s->phy_reg[addr];
+ } else if (val & E1000_MDIC_OP_WRITE) {
+ DBGOUT(MDIC, "MDIC write reg 0x%x, value 0x%x\n", addr, data);
+ if (!(phy_regcap[addr] & PHY_W)) {
+ DBGOUT(MDIC, "MDIC write reg %x unhandled\n", addr);
+ val |= E1000_MDIC_ERROR;
+ } else
+ s->phy_reg[addr] = data;
+ }
+ s->mac_reg[MDIC] = val | E1000_MDIC_READY;
+ set_ics(s, 0, E1000_ICR_MDAC);
+}
+
+static uint32_t
+get_eecd(E1000State *s, int index)
+{
+ uint32_t ret = E1000_EECD_PRES|E1000_EECD_GNT | s->eecd_state.old_eecd;
+
+ DBGOUT(EEPROM, "reading eeprom bit %d (reading %d)\n",
+ s->eecd_state.bitnum_out, s->eecd_state.reading);
+ if (!s->eecd_state.reading ||
+ ((s->eeprom_data[(s->eecd_state.bitnum_out >> 4) & 0x3f] >>
+ ((s->eecd_state.bitnum_out & 0xf) ^ 0xf))) & 1)
+ ret |= E1000_EECD_DO;
+ return ret;
+}
+
+static void
+set_eecd(E1000State *s, int index, uint32_t val)
+{
+ uint32_t oldval = s->eecd_state.old_eecd;
+
+ s->eecd_state.old_eecd = val & (E1000_EECD_SK | E1000_EECD_CS |
+ E1000_EECD_DI|E1000_EECD_FWE_MASK|E1000_EECD_REQ);
+ if (!(E1000_EECD_SK & (val ^ oldval))) // no clock edge
+ return;
+ if (!(E1000_EECD_SK & val)) { // falling edge
+ s->eecd_state.bitnum_out++;
+ return;
+ }
+ if (!(val & E1000_EECD_CS)) { // rising, no CS (EEPROM reset)
+ memset(&s->eecd_state, 0, sizeof s->eecd_state);
+ return;
+ }
+ s->eecd_state.val_in <<= 1;
+ if (val & E1000_EECD_DI)
+ s->eecd_state.val_in |= 1;
+ if (++s->eecd_state.bitnum_in == 9 && !s->eecd_state.reading) {
+ s->eecd_state.bitnum_out = ((s->eecd_state.val_in & 0x3f)<<4)-1;
+ s->eecd_state.reading = (((s->eecd_state.val_in >> 6) & 7) ==
+ EEPROM_READ_OPCODE_MICROWIRE);
+ }
+ DBGOUT(EEPROM, "eeprom bitnum in %d out %d, reading %d\n",
+ s->eecd_state.bitnum_in, s->eecd_state.bitnum_out,
+ s->eecd_state.reading);
+}
+
+static uint32_t
+flash_eerd_read(E1000State *s, int x)
+{
+ unsigned int index, r = s->mac_reg[EERD] & ~E1000_EEPROM_RW_REG_START;
+
+ if ((index = r >> E1000_EEPROM_RW_ADDR_SHIFT) > EEPROM_CHECKSUM_REG)
+ return 0;
+ return (s->eeprom_data[index] << E1000_EEPROM_RW_REG_DATA) |
+ E1000_EEPROM_RW_REG_DONE | r;
+}
+
+static unsigned int
+do_cksum(uint8_t *dp, uint8_t *de)
+{
+ unsigned int bsum[2] = {0, 0}, i, sum;
+
+ for (i = 1; dp < de; bsum[i^=1] += *dp++)
+ ;
+ sum = (bsum[0] << 8) + bsum[1];
+ sum = (sum >> 16) + (sum & 0xffff);
+ return ~(sum + (sum >> 16));
+}
+
+static void
+putsum(uint8_t *data, uint32_t n, uint32_t sloc, uint32_t css, uint32_t cse)
+{
+ if (cse && cse < n)
+ n = cse + 1;
+ if (sloc < n-1)
+ cpu_to_be16wu((uint16_t *)(data + sloc),
+ do_cksum(data + css, data + n));
+}
+
+static void
+xmit_seg(E1000State *s)
+{
+ uint16_t len, *sp;
+ unsigned int frames = s->tx.tso_frames, css, sofar, n;
+ struct e1000_tx *tp = &s->tx;
+
+ if (tp->tse) {
+ css = tp->ipcss;
+ DBGOUT(TXSUM, "frames %d size %d ipcss %d\n",
+ frames, tp->size, css);
+ if (tp->ip) { // IPv4
+ cpu_to_be16wu((uint16_t *)(tp->data+css+2),
+ tp->size - css);
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4),
+ be16_to_cpup((uint16_t *)(tp->data+css+4))+frames);
+ } else // IPv6
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4),
+ tp->size - css);
+ css = tp->tucss;
+ len = tp->size - css;
+ DBGOUT(TXSUM, "tcp %d tucss %d len %d\n", tp->tcp, css, len);
+ if (tp->tcp) {
+ sofar = frames * tp->mss;
+ cpu_to_be32wu((uint32_t *)(tp->data+css+4), // seq
+ be32_to_cpup((uint32_t *)(tp->data+css+4))+sofar);
+ if (tp->paylen - sofar > tp->mss)
+ tp->data[css + 13] &= ~9; // PSH, FIN
+ } else // UDP
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4), len);
+ if (tp->sum_needed & E1000_TXD_POPTS_TXSM) {
+ // add pseudo-header length before checksum calculation
+ sp = (uint16_t *)(tp->data + tp->tucso);
+ cpu_to_be16wu(sp, be16_to_cpup(sp) + len);
+ }
+ tp->tso_frames++;
+ }
+
+ if (tp->sum_needed & E1000_TXD_POPTS_TXSM)
+ putsum(tp->data, tp->size, tp->tucso, tp->tucss, tp->tucse);
+ if (tp->sum_needed & E1000_TXD_POPTS_IXSM)
+ putsum(tp->data, tp->size, tp->ipcso, tp->ipcss, tp->ipcse);
+ qemu_send_packet(s->vc, tp->data, tp->size);
+ s->mac_reg[TPT]++;
+ s->mac_reg[GPTC]++;
+ n = s->mac_reg[TOTL];
+ if ((s->mac_reg[TOTL] += s->tx.size) < n)
+ s->mac_reg[TOTH]++;
+}
+
+static void
+process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
+{
+ uint32_t txd_lower = le32_to_cpu(dp->lower.data);
+ uint32_t dtype = txd_lower & (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D);
+ unsigned int split_size = txd_lower & 0xffff, bytes, sz, op;
+ unsigned int msh = 0xfffff, hdr = 0;
+ uint64_t addr;
+ struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
+ struct e1000_tx *tp = &s->tx;
+
+ if (dtype == E1000_TXD_CMD_DEXT) { // context descriptor
+ op = le32_to_cpu(xp->cmd_and_length);
+ tp->ipcss = xp->lower_setup.ip_fields.ipcss;
+ tp->ipcso = xp->lower_setup.ip_fields.ipcso;
+ tp->ipcse = le16_to_cpu(xp->lower_setup.ip_fields.ipcse);
+ tp->tucss = xp->upper_setup.tcp_fields.tucss;
+ tp->tucso = xp->upper_setup.tcp_fields.tucso;
+ tp->tucse = le16_to_cpu(xp->upper_setup.tcp_fields.tucse);
+ tp->paylen = op & 0xfffff;
+ tp->hdr_len = xp->tcp_seg_setup.fields.hdr_len;
+ tp->mss = le16_to_cpu(xp->tcp_seg_setup.fields.mss);
+ tp->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0;
+ tp->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0;
+ tp->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0;
+ tp->tso_frames = 0;
+ if (tp->tucso == 0) { // this is probably wrong
+ DBGOUT(TXSUM, "TCP/UDP: cso 0!\n");
+ tp->tucso = tp->tucss + (tp->tcp ? 16 : 6);
+ }
+ return;
+ } else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D))
+ tp->sum_needed = le32_to_cpu(dp->upper.data) >> 8;
+
+ addr = le64_to_cpu(dp->buffer_addr);
+ if (tp->tse) {
+ hdr = tp->hdr_len;
+ msh = hdr + tp->mss;
+ }
+ do {
+ bytes = split_size;
+ if (tp->size + bytes > msh)
+ bytes = msh - tp->size;
+ cpu_physical_memory_read(addr, tp->data + tp->size, bytes);
+ if ((sz = tp->size + bytes) >= hdr && tp->size < hdr)
+ memmove(tp->header, tp->data, hdr);
+ tp->size = sz;
+ addr += bytes;
+ if (sz == msh) {
+ xmit_seg(s);
+ memmove(tp->data, tp->header, hdr);
+ tp->size = hdr;
+ }
+ } while (split_size -= bytes);
+
+ if (!(txd_lower & E1000_TXD_CMD_EOP))
+ return;
+ if (tp->size > hdr)
+ xmit_seg(s);
+ tp->tso_frames = 0;
+ tp->sum_needed = 0;
+ tp->size = 0;
+}
+
+static uint32_t
+txdesc_writeback(target_phys_addr_t base, struct e1000_tx_desc *dp)
+{
+ uint32_t txd_upper, txd_lower = le32_to_cpu(dp->lower.data);
+
+ if (!(txd_lower & (E1000_TXD_CMD_RS|E1000_TXD_CMD_RPS)))
+ return 0;
+ txd_upper = (le32_to_cpu(dp->upper.data) | E1000_TXD_STAT_DD) &
+ ~(E1000_TXD_STAT_EC | E1000_TXD_STAT_LC | E1000_TXD_STAT_TU);
+ dp->upper.data = cpu_to_le32(txd_upper);
+ cpu_physical_memory_write(base + ((char *)&dp->upper - (char *)dp),
+ (void *)&dp->upper, sizeof(dp->upper));
+ return E1000_ICR_TXDW;
+}
+
+static void
+start_xmit(E1000State *s)
+{
+ target_phys_addr_t base;
+ struct e1000_tx_desc desc;
+ uint32_t tdh_start = s->mac_reg[TDH], cause = E1000_ICS_TXQE;
+
+ if (!(s->mac_reg[TCTL] & E1000_TCTL_EN)) {
+ DBGOUT(TX, "tx disabled\n");
+ return;
+ }
+
+ while (s->mac_reg[TDH] != s->mac_reg[TDT]) {
+ base = ((uint64_t)s->mac_reg[TDBAH] << 32) + s->mac_reg[TDBAL] +
+ sizeof(struct e1000_tx_desc) * s->mac_reg[TDH];
+ cpu_physical_memory_read(base, (void *)&desc, sizeof(desc));
+
+ DBGOUT(TX, "index %d: %p : %x %x\n", s->mac_reg[TDH],
+ (void *)desc.buffer_addr, desc.lower.data,
+ desc.upper.data);
+
+ process_tx_desc(s, &desc);
+ cause |= txdesc_writeback(base, &desc);
+
+ if (++s->mac_reg[TDH] * sizeof(desc) >= s->mac_reg[TDLEN])
+ s->mac_reg[TDH] = 0;
+ /*
+ * the following could happen only if guest sw assigns
+ * bogus values to TDT/TDLEN.
+ * there's nothing too intelligent we could do about this.
+ */
+ if (s->mac_reg[TDH] == tdh_start) {
+ DBGOUT(TXERR, "TDH wraparound @%x, TDT %x, TDLEN %x\n",
+ tdh_start, s->mac_reg[TDT], s->mac_reg[TDLEN]);
+ break;
+ }
+ }
+ set_ics(s, 0, cause);
+}
+
+static int
+receive_filter(E1000State *s, const uint8_t *buf, int size)
+{
+ static uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ static int mta_shift[] = {4, 3, 2, 0};
+ uint32_t f, rctl = s->mac_reg[RCTL], ra[2], *rp;
+
+ if (rctl & E1000_RCTL_UPE) // promiscuous
+ return 1;
+
+ if ((buf[0] & 1) && (rctl & E1000_RCTL_MPE)) // promiscuous mcast
+ return 1;
+
+ if ((rctl & E1000_RCTL_BAM) && !memcmp(buf, bcast, sizeof bcast))
+ return 1;
+
+ for (rp = s->mac_reg + RA; rp < s->mac_reg + RA + 32; rp += 2) {
+ if (!(rp[1] & E1000_RAH_AV))
+ continue;
+ ra[0] = cpu_to_le32(rp[0]);
+ ra[1] = cpu_to_le32(rp[1]);
+ if (!memcmp(buf, (uint8_t *)ra, 6)) {
+ DBGOUT(RXFILTER,
+ "unicast match[%d]: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ (int)(rp - s->mac_reg - RA)/2,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+ return 1;
+ }
+ }
+ DBGOUT(RXFILTER, "unicast mismatch: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+
+ f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3];
+ f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff;
+ if (s->mac_reg[MTA + (f >> 5)] & (1 << (f & 0x1f)))
+ return 1;
+ DBGOUT(RXFILTER,
+ "dropping, inexact filter mismatch: %02x:%02x:%02x:%02x:%02x:%02x MO %d MTA[%d] %x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
+ (rctl >> E1000_RCTL_MO_SHIFT) & 3, f >> 5,
+ s->mac_reg[MTA + (f >> 5)]);
+
+ return 0;
+}
+
+static int
+e1000_can_receive(void *opaque)
+{
+ E1000State *s = opaque;
+
+ return (!(s->mac_reg[RCTL] & E1000_RCTL_EN) ||
+ s->mac_reg[RDH] != s->mac_reg[RDT]);
+}
+
+static void
+e1000_receive(void *opaque, const uint8_t *buf, int size)
+{
+ E1000State *s = opaque;
+ struct e1000_rx_desc desc;
+ target_phys_addr_t base;
+ unsigned int n, rdt;
+ uint32_t rdh_start;
+
+ if (!(s->mac_reg[RCTL] & E1000_RCTL_EN))
+ return;
+
+ if (size > s->rxbuf_size) {
+ DBGOUT(RX, "packet too large for buffers (%d > %d)\n", size,
+ s->rxbuf_size);
+ return;
+ }
+
+ if (!receive_filter(s, buf, size))
+ return;
+
+ rdh_start = s->mac_reg[RDH];
+ size += 4; // for the header
+ do {
+ if (s->mac_reg[RDH] == s->mac_reg[RDT] && s->check_rxov) {
+ set_ics(s, 0, E1000_ICS_RXO);
+ return;
+ }
+ base = ((uint64_t)s->mac_reg[RDBAH] << 32) + s->mac_reg[RDBAL] +
+ sizeof(desc) * s->mac_reg[RDH];
+ cpu_physical_memory_read(base, (void *)&desc, sizeof(desc));
+ desc.status |= E1000_RXD_STAT_DD;
+ if (desc.buffer_addr) {
+ cpu_physical_memory_write(le64_to_cpu(desc.buffer_addr),
+ (void *)buf, size);
+ desc.length = cpu_to_le16(size);
+ desc.status |= E1000_RXD_STAT_EOP|E1000_RXD_STAT_IXSM;
+ } else // as per intel docs; skip descriptors with null buf addr
+ DBGOUT(RX, "Null RX descriptor!!\n");
+ cpu_physical_memory_write(base, (void *)&desc, sizeof(desc));
+
+ if (++s->mac_reg[RDH] * sizeof(desc) >= s->mac_reg[RDLEN])
+ s->mac_reg[RDH] = 0;
+ s->check_rxov = 1;
+ /* see comment in start_xmit; same here */
+ if (s->mac_reg[RDH] == rdh_start) {
+ DBGOUT(RXERR, "RDH wraparound @%x, RDT %x, RDLEN %x\n",
+ rdh_start, s->mac_reg[RDT], s->mac_reg[RDLEN]);
+ set_ics(s, 0, E1000_ICS_RXO);
+ return;
+ }
+ } while (desc.buffer_addr == 0);
+
+ s->mac_reg[GPRC]++;
+ s->mac_reg[TPR]++;
+ n = s->mac_reg[TORL];
+ if ((s->mac_reg[TORL] += size) < n)
+ s->mac_reg[TORH]++;
+
+ n = E1000_ICS_RXT0;
+ if ((rdt = s->mac_reg[RDT]) < s->mac_reg[RDH])
+ rdt += s->mac_reg[RDLEN] / sizeof(desc);
+ if (((rdt - s->mac_reg[RDH]) * sizeof(desc)) << s->rxbuf_min_shift >=
+ s->mac_reg[RDLEN])
+ n |= E1000_ICS_RXDMT0;
+
+ set_ics(s, 0, n);
+}
+
+static uint32_t
+mac_readreg(E1000State *s, int index)
+{
+ return s->mac_reg[index];
+}
+
+static uint32_t
+mac_icr_read(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[ICR];
+
+ DBGOUT(INTERRUPT, "ICR read: %x\n", ret);
+ set_interrupt_cause(s, 0, 0);
+ return ret;
+}
+
+static uint32_t
+mac_read_clr4(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[index];
+
+ s->mac_reg[index] = 0;
+ return ret;
+}
+
+static uint32_t
+mac_read_clr8(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[index];
+
+ s->mac_reg[index] = 0;
+ s->mac_reg[index-1] = 0;
+ return ret;
+}
+
+static void
+mac_writereg(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val;
+}
+
+static void
+set_rdt(E1000State *s, int index, uint32_t val)
+{
+ s->check_rxov = 0;
+ s->mac_reg[index] = val & 0xffff;
+}
+
+static void
+set_16bit(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val & 0xffff;
+}
+
+static void
+set_dlen(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val & 0xfff80;
+}
+
+static void
+set_tctl(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val;
+ s->mac_reg[TDT] &= 0xffff;
+ start_xmit(s);
+}
+
+static void
+set_icr(E1000State *s, int index, uint32_t val)
+{
+ DBGOUT(INTERRUPT, "set_icr %x\n", val);
+ set_interrupt_cause(s, 0, s->mac_reg[ICR] & ~val);
+}
+
+static void
+set_imc(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[IMS] &= ~val;
+ set_ics(s, 0, 0);
+}
+
+static void
+set_ims(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[IMS] |= val;
+ set_ics(s, 0, 0);
+}
+
+#define getreg(x) [x] = mac_readreg
+static uint32_t (*macreg_readops[])(E1000State *, int) = {
+ getreg(PBA), getreg(RCTL), getreg(TDH), getreg(TXDCTL),
+ getreg(WUFC), getreg(TDT), getreg(CTRL), getreg(LEDCTL),
+ getreg(MANC), getreg(MDIC), getreg(SWSM), getreg(STATUS),
+ getreg(TORL), getreg(TOTL), getreg(IMS), getreg(TCTL),
+ getreg(RDH), getreg(RDT),
+
+ [TOTH] = mac_read_clr8, [TORH] = mac_read_clr8, [GPRC] = mac_read_clr4,
+ [GPTC] = mac_read_clr4, [TPR] = mac_read_clr4, [TPT] = mac_read_clr4,
+ [ICR] = mac_icr_read, [EECD] = get_eecd, [EERD] = flash_eerd_read,
+ [CRCERRS ... MPC] = &mac_readreg,
+ [RA ... RA+31] = &mac_readreg,
+ [MTA ... MTA+127] = &mac_readreg,
+};
+enum { NREADOPS = sizeof(macreg_readops) / sizeof(*macreg_readops) };
+
+#define putreg(x) [x] = mac_writereg
+static void (*macreg_writeops[])(E1000State *, int, uint32_t) = {
+ putreg(PBA), putreg(EERD), putreg(SWSM), putreg(WUFC),
+ putreg(TDBAL), putreg(TDBAH), putreg(TXDCTL), putreg(RDBAH),
+ putreg(RDBAL), putreg(LEDCTL),
+ [TDLEN] = set_dlen, [RDLEN] = set_dlen, [TCTL] = set_tctl,
+ [TDT] = set_tctl, [MDIC] = set_mdic, [ICS] = set_ics,
+ [TDH] = set_16bit, [RDH] = set_16bit, [RDT] = set_rdt,
+ [IMC] = set_imc, [IMS] = set_ims, [ICR] = set_icr,
+ [EECD] = set_eecd, [RCTL] = set_rx_control,
+ [RA ... RA+31] = &mac_writereg,
+ [MTA ... MTA+127] = &mac_writereg,
+};
+enum { NWRITEOPS = sizeof(macreg_writeops) / sizeof(*macreg_writeops) };
+
+static void
+e1000_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ E1000State *s = opaque;
+ unsigned int index = ((addr - s->mmio_base) & 0x1ffff) >> 2;
+
+ if (index < NWRITEOPS && macreg_writeops[index])
+ macreg_writeops[index](s, index, le32_to_cpu(val));
+ else if (index < NREADOPS && macreg_readops[index])
+ DBGOUT(MMIO, "e1000_mmio_writel RO %x: 0x%04x\n", index<<2, val);
+ else
+ DBGOUT(UNKNOWN, "MMIO unknown write addr=0x%08x,val=0x%08x\n",
+ index<<2, val);
+}
+
+static void
+e1000_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ // emulate hw without byte enables: no RMW
+ e1000_mmio_writel(opaque, addr & ~3,
+ cpu_to_le32(le16_to_cpu(val & 0xffff) << (8*(addr & 3))));
+}
+
+static void
+e1000_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ // emulate hw without byte enables: no RMW
+ e1000_mmio_writel(opaque, addr & ~3,
+ cpu_to_le32((val & 0xff) << (8*(addr & 3))));
+}
+
+static uint32_t
+e1000_mmio_readl(void *opaque, target_phys_addr_t addr)
+{
+ E1000State *s = opaque;
+ unsigned int index = ((addr - s->mmio_base) & 0x1ffff) >> 2;
+
+ if (index < NREADOPS && macreg_readops[index])
+ return cpu_to_le32(macreg_readops[index](s, index));
+ DBGOUT(UNKNOWN, "MMIO unknown read addr=0x%08x\n", index<<2);
+ return 0;
+}
+
+static uint32_t
+e1000_mmio_readb(void *opaque, target_phys_addr_t addr)
+{
+ return (le32_to_cpu(e1000_mmio_readl(opaque, addr & ~3)) >>
+ (8 * (addr & 3))) & 0xff;
+}
+
+static uint32_t
+e1000_mmio_readw(void *opaque, target_phys_addr_t addr)
+{
+ return cpu_to_le16((le32_to_cpu(e1000_mmio_readl(opaque, addr & ~3)) >>
+ (8 * (addr & 3))) & 0xffff);
+}
+
+int mac_regtosave[] = {
+ CTRL, EECD, EERD, GPRC, GPTC, ICR, ICS, IMC, IMS,
+ LEDCTL, MANC, MDIC, MPC, PBA, RCTL, RDBAH, RDBAL, RDH,
+ RDLEN, RDT, STATUS, SWSM, TCTL, TDBAH, TDBAL, TDH, TDLEN,
+ TDT, TORH, TORL, TOTH, TOTL, TPR, TPT, TXDCTL, WUFC,
+};
+enum { MAC_NSAVE = sizeof mac_regtosave/sizeof *mac_regtosave };
+
+struct {
+ int size;
+ int array0;
+} mac_regarraystosave[] = { {32, RA}, {128, MTA} };
+enum { MAC_NARRAYS = sizeof mac_regarraystosave/sizeof *mac_regarraystosave };
+
+static void
+nic_save(QEMUFile *f, void *opaque)
+{
+ E1000State *s = (E1000State *)opaque;
+ int i, j;
+
+ pci_device_save(&s->dev, f);
+ qemu_put_be32s(f, &s->instance);
+ qemu_put_be32s(f, &s->mmio_base);
+ qemu_put_be32s(f, &s->rxbuf_size);
+ qemu_put_be32s(f, &s->rxbuf_min_shift);
+ qemu_put_be32s(f, &s->eecd_state.val_in);
+ qemu_put_be16s(f, &s->eecd_state.bitnum_in);
+ qemu_put_be16s(f, &s->eecd_state.bitnum_out);
+ qemu_put_be16s(f, &s->eecd_state.reading);
+ qemu_put_be32s(f, &s->eecd_state.old_eecd);
+ qemu_put_8s(f, &s->tx.ipcss);
+ qemu_put_8s(f, &s->tx.ipcso);
+ qemu_put_be16s(f, &s->tx.ipcse);
+ qemu_put_8s(f, &s->tx.tucss);
+ qemu_put_8s(f, &s->tx.tucso);
+ qemu_put_be16s(f, &s->tx.tucse);
+ qemu_put_be32s(f, &s->tx.paylen);
+ qemu_put_8s(f, &s->tx.hdr_len);
+ qemu_put_be16s(f, &s->tx.mss);
+ qemu_put_be16s(f, &s->tx.size);
+ qemu_put_be16s(f, &s->tx.tso_frames);
+ qemu_put_8s(f, &s->tx.sum_needed);
+ qemu_put_8s(f, &s->tx.ip);
+ qemu_put_8s(f, &s->tx.tcp);
+ qemu_put_buffer(f, s->tx.header, sizeof s->tx.header);
+ qemu_put_buffer(f, s->tx.data, sizeof s->tx.data);
+ for (i = 0; i < 64; i++)
+ qemu_put_be16s(f, s->eeprom_data + i);
+ for (i = 0; i < 0x20; i++)
+ qemu_put_be16s(f, s->phy_reg + i);
+ for (i = 0; i < MAC_NSAVE; i++)
+ qemu_put_be32s(f, s->mac_reg + mac_regtosave[i]);
+ for (i = 0; i < MAC_NARRAYS; i++)
+ for (j = 0; j < mac_regarraystosave[i].size; j++)
+ qemu_put_be32s(f,
+ s->mac_reg + mac_regarraystosave[i].array0 + j);
+}
+
+static int
+nic_load(QEMUFile *f, void *opaque, int version_id)
+{
+ E1000State *s = (E1000State *)opaque;
+ int i, j, ret;
+
+ if ((ret = pci_device_load(&s->dev, f)) < 0)
+ return ret;
+ qemu_get_be32s(f, &s->instance);
+ qemu_get_be32s(f, &s->mmio_base);
+ qemu_get_be32s(f, &s->rxbuf_size);
+ qemu_get_be32s(f, &s->rxbuf_min_shift);
+ qemu_get_be32s(f, &s->eecd_state.val_in);
+ qemu_get_be16s(f, &s->eecd_state.bitnum_in);
+ qemu_get_be16s(f, &s->eecd_state.bitnum_out);
+ qemu_get_be16s(f, &s->eecd_state.reading);
+ qemu_get_be32s(f, &s->eecd_state.old_eecd);
+ qemu_get_8s(f, &s->tx.ipcss);
+ qemu_get_8s(f, &s->tx.ipcso);
+ qemu_get_be16s(f, &s->tx.ipcse);
+ qemu_get_8s(f, &s->tx.tucss);
+ qemu_get_8s(f, &s->tx.tucso);
+ qemu_get_be16s(f, &s->tx.tucse);
+ qemu_get_be32s(f, &s->tx.paylen);
+ qemu_get_8s(f, &s->tx.hdr_len);
+ qemu_get_be16s(f, &s->tx.mss);
+ qemu_get_be16s(f, &s->tx.size);
+ qemu_get_be16s(f, &s->tx.tso_frames);
+ qemu_get_8s(f, &s->tx.sum_needed);
+ qemu_get_8s(f, &s->tx.ip);
+ qemu_get_8s(f, &s->tx.tcp);
+ qemu_get_buffer(f, s->tx.header, sizeof s->tx.header);
+ qemu_get_buffer(f, s->tx.data, sizeof s->tx.data);
+ for (i = 0; i < 64; i++)
+ qemu_get_be16s(f, s->eeprom_data + i);
+ for (i = 0; i < 0x20; i++)
+ qemu_get_be16s(f, s->phy_reg + i);
+ for (i = 0; i < MAC_NSAVE; i++)
+ qemu_get_be32s(f, s->mac_reg + mac_regtosave[i]);
+ for (i = 0; i < MAC_NARRAYS; i++)
+ for (j = 0; j < mac_regarraystosave[i].size; j++)
+ qemu_get_be32s(f,
+ s->mac_reg + mac_regarraystosave[i].array0 + j);
+ return 0;
+}
+
+static uint16_t e1000_eeprom_template[64] = {
+ 0x0000, 0x0000, 0x0000, 0x0000, 0xffff, 0x0000, 0x0000, 0x0000,
+ 0x3000, 0x1000, 0x6403, E1000_DEVID, 0x8086, E1000_DEVID, 0x8086, 0x3040,
+ 0x0008, 0x2000, 0x7e14, 0x0048, 0x1000, 0x00d8, 0x0000, 0x2700,
+ 0x6cc9, 0x3150, 0x0722, 0x040b, 0x0984, 0x0000, 0xc000, 0x0706,
+ 0x1008, 0x0000, 0x0f04, 0x7fff, 0x4d01, 0xffff, 0xffff, 0xffff,
+ 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
+ 0x0100, 0x4000, 0x121c, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
+ 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0x0000,
+};
+
+static uint16_t phy_reg_init[] = {
+ [PHY_CTRL] = 0x1140, [PHY_STATUS] = 0x796d, // link initially up
+ [PHY_ID1] = 0x141, [PHY_ID2] = PHY_ID2_INIT,
+ [PHY_1000T_CTRL] = 0x0e00, [M88E1000_PHY_SPEC_CTRL] = 0x360,
+ [M88E1000_EXT_PHY_SPEC_CTRL] = 0x0d60, [PHY_AUTONEG_ADV] = 0xde1,
+ [PHY_LP_ABILITY] = 0x1e0, [PHY_1000T_STATUS] = 0x3c00,
+};
+
+static uint32_t mac_reg_init[] = {
+ [PBA] = 0x00100030,
+ [LEDCTL] = 0x602,
+ [CTRL] = E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN0 |
+ E1000_CTRL_SPD_1000 | E1000_CTRL_SLU,
+ [STATUS] = 0x80000000 | E1000_STATUS_GIO_MASTER_ENABLE |
+ E1000_STATUS_ASDV | E1000_STATUS_MTXCKOK |
+ E1000_STATUS_SPEED_1000 | E1000_STATUS_FD |
+ E1000_STATUS_LU,
+ [MANC] = E1000_MANC_EN_MNG2HOST | E1000_MANC_RCV_TCO_EN |
+ E1000_MANC_ARP_EN | E1000_MANC_0298_EN |
+ E1000_MANC_RMCP_EN,
+};
+
+/* PCI interface */
+
+static CPUWriteMemoryFunc *e1000_mmio_write[] = {
+ e1000_mmio_writeb, e1000_mmio_writew, e1000_mmio_writel
+};
+
+static CPUReadMemoryFunc *e1000_mmio_read[] = {
+ e1000_mmio_readb, e1000_mmio_readw, e1000_mmio_readl
+};
+
+static void
+e1000_mmio_map(PCIDevice *pci_dev, int region_num,
+ uint32_t addr, uint32_t size, int type)
+{
+ E1000State *d = (E1000State *)pci_dev;
+
+ DBGOUT(MMIO, "e1000_mmio_map addr=0x%08x 0x%08x\n", addr, size);
+
+ d->mmio_base = addr;
+ cpu_register_physical_memory(addr, PNPMMIO_SIZE, d->mmio_index);
+}
+
+void
+pci_e1000_init(PCIBus *bus, NICInfo *nd, int devfn)
+{
+ E1000State *d;
+ uint8_t *pci_conf;
+ static int instance;
+ uint16_t checksum = 0;
+ char *info_str = "e1000";
+ int i;
+
+ d = (E1000State *)pci_register_device(bus, "e1000",
+ sizeof(E1000State), devfn, NULL, NULL);
+
+ pci_conf = d->dev.config;
+ memset(pci_conf, 0, 256);
+
+ *(uint16_t *)(pci_conf+0x00) = cpu_to_le16(0x8086);
+ *(uint16_t *)(pci_conf+0x02) = cpu_to_le16(E1000_DEVID);
+ *(uint16_t *)(pci_conf+0x04) = cpu_to_le16(0x0407);
+ *(uint16_t *)(pci_conf+0x06) = cpu_to_le16(0x0010);
+ pci_conf[0x08] = 0x03;
+ pci_conf[0x0a] = 0x00; // ethernet network controller
+ pci_conf[0x0b] = 0x02;
+ pci_conf[0x0c] = 0x10;
+
+ pci_conf[0x3d] = 1; // interrupt pin 0
+
+ d->mmio_index = cpu_register_io_memory(0, e1000_mmio_read,
+ e1000_mmio_write, d);
+
+ pci_register_io_region((PCIDevice *)d, 0, PNPMMIO_SIZE,
+ PCI_ADDRESS_SPACE_MEM, e1000_mmio_map);
+
+ pci_register_io_region((PCIDevice *)d, 1, IOPORT_SIZE,
+ PCI_ADDRESS_SPACE_IO, ioport_map);
+
+ d->instance = instance++;
+
+ d->nd = nd;
+ memmove(d->eeprom_data, e1000_eeprom_template,
+ sizeof e1000_eeprom_template);
+ for (i = 0; i < 3; i++)
+ d->eeprom_data[i] = (nd->macaddr[2*i+1]<<8) | nd->macaddr[2*i];
+ for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
+ checksum += d->eeprom_data[i];
+ checksum = (uint16_t) EEPROM_SUM - checksum;
+ d->eeprom_data[EEPROM_CHECKSUM_REG] = checksum;
+
+ memset(d->phy_reg, 0, sizeof d->phy_reg);
+ memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
+ memset(d->mac_reg, 0, sizeof d->mac_reg);
+ memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
+ d->rxbuf_min_shift = 1;
+ memset(&d->tx, 0, sizeof d->tx);
+
+ d->vc = qemu_new_vlan_client(nd->vlan, e1000_receive,
+ e1000_can_receive, d);
+
+ snprintf(d->vc->info_str, sizeof(d->vc->info_str),
+ "%s macaddr=%02x:%02x:%02x:%02x:%02x:%02x", info_str,
+ d->nd->macaddr[0], d->nd->macaddr[1], d->nd->macaddr[2],
+ d->nd->macaddr[3], d->nd->macaddr[4], d->nd->macaddr[5]);
+
+ register_savevm(info_str, d->instance, 1, nic_save, nic_load, d);
+}
generated by cgit v1.1 at 2024-12-28 18:20:49 +0000